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What is the correct answer?

4

A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is

A. cork cambium

B. vascular cambium

C. endodermis

D. both (a) & (c)

Correct Answer :

B. vascular cambium


Vascular cambium is located between the xylem and the phloem in the stem and roots of a vascular plant, and is the source of both the secondary xylem growth (inwards, towards the pith) and the secondary phloem growth (outwards).

Related Questions

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4

Match column-I with column-II and select the correct option from the codes given below.
Column-IColumn-II
A. SteleI. Innermost layer of cortex
B. EndodermisII. Suberin
C. Casparian stripsIII. All the tissues exterior to vascular cambium
D. BarkIV. All the tissues inner to endodermis

A. A IV, B I, C II, D III

B. A III, B II, C I, D IV

C. A I, B II, C III, D IV

D. A IV, B II, C I, D III

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4

Why grafting is successful in dicots ?

A. In dicots vascular bundles are arranged in a ring.

B. Dicots have cambium for secondary growth.

C. In dicots vessels with elements are arranged end to end.

D. Cork cambium is present in dicots

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4

Read the following statements and answer the question.
  1. Cambium is very active and produces a large number of xylary elements having vessels with wider cavities.
  2. It is also called early wood.
  3. It is lighter in colour and has lower density.

Which type of wood is described by the above statements?

A. Sap wood

B. Heart wood

C. Spring wood

D. Autumn wood

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4

Which of the following figure is a type of permanent tissue having many different types of cell?

A.

B.

C.

D.

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4

The given diagrams show stomatal apparatus in dicots and monocots. Which one is correct option for A, B and C?

A. A Epidermal cells; B Subsidiary cells; C chloroplast

B. A Guard cells; B Subsidiary cells; C Stomatal pore

C. A Guard cells; B Epidermal cells; C Guard cells

D. A Epidermal cells; B Subsidiary cells; C Guard cells

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4

A common structural feature of vessel elements and sieve tube elements are

A. pores on lateral walls.

B. presence of p-protein.

C. enucleate condition.

D. thick secondary walls.

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4

The trees growing in desert will

A. show alternate rings of xylem and sclerenchyma.

B. have only conjunctive tissue and phloem is formed by the activity of cambium.

C. show distinct annual rings.

D. not show distinct annual rings.

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4

In the given columns, column I contain structures of female reproductive system and column II contain its feature. Select the correct match.
Column-IColumn-II
A. Lateral meristem(i) Fascicular vascular cambium, interfascicular cambium and cork cambium.
B. Apical meristem(ii) Produces dermal tissue, ground tissues and vascular tissue.
C. Bast fibres(iii) Generally absent in primary phloem but found in secondary phloem.
D. Sap wood(iv) Involved in the conduction of water and minerals from the root to leaf.

A. A - (i), B - (ii), C - (iii), D - (iv)

B. A - (iii), B - (i), C - (ii), D - (iv)

C. A - (i), B - (iv), C - (iii), D - (ii)

D. A - (ii), B - (iv), C - (iii), D - (i)

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4

Identify the types of simple tissue indicated by A, B, C and D and their function.

A. A Parenchyma, Photosynthesis, Storage and Secretion.

B. B Sclerenchyma Scleriods; Transport food material

C. C Collenchyma; Provides mechanical support to organs.

D. D Sclerenchyma Fibres; Provide Mechanical support to the growing parts of the plant such as young stem and petiole of a leaf.

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4

The given figure shows apical meristem of root apex with few part marked as A, B and C. Identify the correct labelling of A, B and C.

A. A Vascular structure, B Protoderm, C Root cap

B. A Cortex, B Endodermis, C Root cap

C. A Cortex, B Protoderm, C Root cap

D. A Tunica, B Protoderm, C Root cap

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4

Which of the following statement(s) is/are not correct?
  1. Cork cambium is also called phellogen.
  2. Cork is also called phellem.
  3. Secondary cortex is also called periderm.
  4. Cork cambium, cork and secondary cortex are collectively called phelloderm.

A. (iii) and (iv)

B. (i) and (ii)

C. (ii) and (iii)

D. (ii) and (iv)

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4

Match the followings and choose the correct option
Column-IColumn-II
A. CuticleI. Guard cells
B. Bulliform cellsII. Outer layer
C. StomataIII. Waxy layer
D. EpidermisIV. Empty colourless cell

A. A III, B IV, C I, D II

B. A I, B II, C III, D IV

C. A III, B II, C IV, D I

D. A III, B II, C I, D IV

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4

In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden.
After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?

A. With the help of bulliform cells.

B. With the help of casparian strips.

C. With the help of vascular bundles.

D. With the help of stomatal apparatus.

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4

Trees at sea do not have annual rings because

A. soil is sandy.

B. there is climatic variation.

C. there is no marked climatic variation.

D. there is enough moisture in the atmosphere.

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4

A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is

A. cork cambium

B. vascular cambium

C. endodermis

D. both (a) & (c)

What is the correct answer?

4

Tissue(s) present in an annual ring is/are

A. secondary xylem and phloem.

B. primary xylem and phloem.

C. secondary xylem only.

D. primary phloem and secondary xylem.

What is the correct answer?

4

Gymnosperms are also called soft wood spermatophytes because they lack

A. cambium

B. phloem fibres

C. thick-walled tracheids

D. xylem fibres

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4

Cambium is considered as a lateral meristem because

A. it gives rise to lateral branches.

B. it causes increase in girth.

C. it increases height and diameter of a plant.

D. it adds bulk to a plant.

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4

Which meristem helps in increasing girth?

A. Lateral meristem

B. Intercalary meristem

C. Primary meristem

D. Apical meristem

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4

Some vascular bundles are described as open because these

A. are surrounded by pericycle but not endodermis.

B. are capable of producing secondary xylem and phloem.

C. possess conjunctive tissue between xylem and phloem.

D. are not surrounded by pericycle.

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4

Match the names of the structures given in column-I with the functions given in column-II, choose the answer which gives the correct combination of the two columns :
Column-IColumn-II
(Structure)(Function)
A. StomataI. Protection of stem
B. BarkII. Plant movement
C. CambiumIII. Secondary growth
D. CuticleIV. Transpiration
V. Prevent the loss of water...

A. A V, B III, C I, D IV

B. A I, B IV, C V, D III

C. A II, B IV, C I, D III

D. A IV, B I, C III, D V

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4

In the given figure of phloem tissue, identify the marked part (A, B and C) which help in maintaining the pressure gradient
in the sieve tubes.

A. A

B. B

C. C

D. None of the above

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4

The given figure shows the T.S of dicot root. Some parts are marked as A, B, C, D, E, & F. Choose the option which shows the correct labelling of marked part.

A. A Epiblema, B Root hair, C Cortex, D Endodermis, E Pith, F Pericycle

B. A Cortex, B Pith, C Epiblema, D Endodermis, E Root hair, F Pericycle

C. A Epiblema, B Endodermis, C Cortex, D Root hair, E Pith, F Pericycle

D. A Cortex, B Epiblema, C Pith, D Endodermis, E Root hair, F Pericycle

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4

In land plants, the guard cells differ from other epidermal cells in having

A. cytoskeleton.

B. mitochondria.

C. endoplasmic reticulum.

D. chloroplasts.

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4

The apical meristem of the root is present

A. in all the roots.

B. only in radicals.

C. only in tap roots.

D. only in adventitious roots.

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4

Xylem functions as a conducting tissue for water and minerals from _________to the ______and__________.

A. roots, stems, leaves

B. stems, roots, leaves

C. leaves, stems, roots

D. leaves, stems, leaves

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4

Match the elements of xylem given in column I with their character given in the column II and choose the correct option.
Column-IColumn-II
A. Xylem vesselsI. Store food materials
B. Xylem tracheidsII. Obliterated lumen
C. Xylem fibresIII. Perforated plates
D. Xylem parenchymaIV. Chisel-like ends

A. A IV; B III; C II; D I

B. A III; B II; C I; D IV

C. A II; B I; C IV; D III

D. A III; B IV; C II; D I

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4

Which of the following are present in monocot root ?

A. conjoint, collateral, open polyarch vascular bundle.

B. exodermis, endarch, tetrarch closed vascular bundles.

C. suberized exodermis, casparian strip, passage cells, cambium.

D. suberized exodermis, polyarch xylem, pith.

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4

Identify A, B and C in the given figure of shoot apical meristem

A. A Leaf primordium, B Shoot apical meristem, C Axillary bud

B. A Leaf primordium, B Shoot apical meristem, C Apical bud

C. A Root hair primordium, B Root apical meristem, C Axillary bud

D. A Root hair primordium, B Root apical meristem, C Terminal bud

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4

Match column-I with column-II and choose the correct option.
Column -IColumn -II
A. Bulliform cellsI. Initiation of lateral roots
B. PericycleII. Root
C. Endarch xylemIII. Grasses
D. Exarch xylemIV. Dicot leaf
E. Bundle sheath cellsV. Stem

A. A III, B V, C IV, D I, E II

B. A II, B V, C I, D III, E IV

C. A II, B IV, C I, D III, E V

D. A III, B I, C V, D II, E IV